Sliding body, in particular a ski or runner

ABSTRACT

A sliding device, in particular a ski, comprises a sliding body and means on the sliding body for controlling vibration thereof. The controlling means comprises at least one sequence of a plurality of spatial, planar or linear areas, each of which is distinguished from at least a part of its vicinity by at least one differently dimensioned or distributed vibration parameter. The center distances between subsequent distinguished areas, or the distances between certain sections within subsequent distinguished areas, is dimensioned according to at least one predetermined increasingly or decreasingly varying progression. The increasingly or decreasingly varying distances are configured such that the areas establish a vibration active structure of the sliding body with a plurality of natural or resonant frequencies.

RELATED APPLICATIONS

This application is based under 35 USC 371 on, and claims the benefitof, PCT/EP95/00540, filed Aug. 17, 1995.

RELATED APPLICATIONS

This application is based under 35 USC 371 on, and claims the benefit ofPCT/EP95/00540, filed Feb. 14, 1995, published as WO95/21663 Aug. 17,1995.

BACKGROUND OF THE INVENTION

1. Technical Field

The invention relates to a sliding body, in particular a ski or runner,as they are usable with apparatus and vehicles, particularly for snowand ice, but for water sports also.

2. Description of the Related Art

Essential for good sliding properties as well as for directionalstability and steering ease or manoeuvrability resp. and also fordurability under shock-like and vibrating stresses is the oscillatingresponse of the body or its external parts getting in interaction withthe sliding medium. According to usual technique substantially only heoscillating response in very low frequency ranges is taken intoconsideration. In this way spacious or macroscopic phenomina can betaken into account which, however, left open desires for variousoptimizations up to now.

Therefore, the task of the invention is the creation of sliding bodiesfurther improved with regard to the aforesaid points. The basic idea ofthe solution according to the invention here is taking into accountmedium and higher frequency ranges or characteristic frequencies andabove all, the resonance spectra in those ranges.

To the the task as set above the solution according to the invention isdefined by the features of the patent claim 1 or of the subordinateclaims. The features of the dependent claims present inventivelyessential integral parts or further developments resp.. The subjectmatters thereof are practicable each alone, however, with specialadvantages in the various possible combinations.

The basic idea of the invention consists in the realization of at leastone vibration-reactive subdivisional structure with at least onesequence of distinct spatial, superficial or linear region, whichpresent at least one vibration parameter, particularly a local spatialor suberficial mass density, resistance to bending deformation ordampening, which is dimensioned or distributed differently in relationto at least one adjacent region or within the region itself. Withadvantage there is provided at least one sequence of a plurality ofdistinct regions with differently dimensioned or distributed vibrationparameters. Further an essential feature consists in providing at leastone periodic sequence of distinct regions with differently dimensionedor distributed vibration parameters. In particular at least one sequenceof distinct regions with differently dimensioned or distributedvibration parameters is considered, which sequence extends along asurface of the sliding body, and which e.g. may comprise at least onesequence of distinct regions extending substantially in the interior ofthe sliding body and having differently dimensioned or distributedvibration parameters, particularly at least one sequence of distinctregions having differently dimensioned or distributed vibrationparameters and extending multidimensionally or in a plurality of spatialor superficial directions.

In further developing the invention at least partially differentdistance sequences between the distinct regions and/or differentvibration parameter variations from region to region are assigned to thedifferent dimensions or spatial or superficial directions resp., inwhich a sequence of distinct regions with differently dimensioned ordistributed vibration parameters extends, in which context particularlysaid distinct regions with differently dimensioned or distributedvibration parameters are arranged serially or grid-like in at least onearea, particularly within a surface section of the sliding body.

The distinct regions of different vibration parameters may be arrangedin a distribution in at least one surface section and/or at least onewall section of a cavity of the sliding body or along at least one edgeof the sliding body. In a further variation the distinct spatial,superficial or linear regions comprise at least one section with valuesof one or more vibration parameters being higher in relation to itsvicinity.

In a further variation of the invention there are sections providedhaving vibration parameters, particularly a surface-related local massdensity or a local deformation resistance, which is higher in relationto at least a part of their vicinity due to elevations within a surfaceof the sliding body, said elevations being formed particularly rib-,wave- or hump-like and preferably formed as mounted elements in therange of a sliding body surface. A preferred realization providessections having vibration parameters, in particular a surface-relatedlocal mass density or a local deformation resistance, which is higher inrelation to at least a part of their vicinity, said sections beingformed by elements embedded in a basic material. Such embedded elementse.g. may consist of at least one material different from the basicmaterial, in particular of a material of higher density or of a higherelasticity modulus, preferably of heavy metal.

An important further development provides spatial or superficial regionshaving at least one section with values of one or more vibrationparameters, particularly a surface-related local mass density or a localdeformation resistance, being minor in relation to their vicinity. Suchsections e.g. are formed as excavations or openings within a surface ofthe sliding body, particularly also as depressions in the form ofnotches or callote shells. Essential is also the possibility to realizethe sections with values of at least one vibration parameter minor inrelation to their vicinity, in particular of surface-related local massdensity or local deformation resistance, by means elements embedded in abasic material. Such embedded elements may consist of at least onematerial different from the basic material, particularly of a materialof lower density or of a lower elasticity modulus, preferably of lightmetal.

An inventive idea leading further is characterized by at least onevibration-reactively subdivided surface layer or at least one layersection, particularly in the form of a coating by granulates, lacquer orfoil, preferably with metal contents.

Further essential according to the invention is a realization in whichat least in a part of a vibration-reactive subdivision the centerdistances of subsequent distinct spatial, superficial or linear regionsor the distances between certain sections within subsequent distinctregions are dimensioned at least approximately equal. There it is oftensufficient and advantageously simple that at least in a part of of avibration-reactive subdivision the extremal or average values or thedistribution of the values of at least one vibration parameter insubsequent distinct regions are dimensioned at least approximatelyequal. However, for optimazation it is generally advisable, at least ina part of a vibration-reactive subdivision, to dimension the centerdistances of subsequent distinct regions or the distances betweencertain sections within subsequent distinct regions variable with regardto a predetermined sequential direction.

With certain effects which are advantageous depending on the applicationconditions, there the center distances of subsequent distinct regions orthe distances between certain sections within subsequent distinctregions may be dimensioned progressively or degressively variable in asequential direction in at least a part of a vibration-reactivesubdivision. Here again it may be essential to dimension the extremal oraverage values or the distribution of the values of at least onevibration parameter in subsequent distinct regions variable with regardto a predetermined sequential direction, that is with specific effectswith regard to a predetermined sequential direction progressively ordegressively variable, particularly e.g. in the form of a sequence ofdistances or values being unidirectional at least by sections. Inparticular a sequence of distances or values oscillatingly variable atleast by sections is considered. In this context a particularlyessential variation consists in that the distinct regions subdivide atotal or partial dimension of the sliding body in accordance with thevalues of a predetermined progression.

Thorough investigations and practical experiments have shown that thesequence of distances and/or subdivisions and/or values should bedimensioned at least approximately according to a harmonic progression,in special cases eventually according to a geometric progression.

A rapid further development of the inventive ideas consists in providingat least one vibration-reactive subdivision which comprises at least onesuperpositional structure extending linearly, superficially or spatiallyand containing at least two sequences of distances and/or subdivisionsand/or values. There a specific mode of realizing this feature maycomprise at least one vibration-reactive subdivision with at least onesuperpositional structure extending linearly, superficially or spatiallyand containing at least two equidistant sequences.

The values and/or distribution of at least one vibration parameter inthe subsequent distinct regions e.g. may be dimensioned at leastapproximately equal within each equidistant sequence, however,preferably these values are dimensioned at least by sections inaccordance with at least one harmonic or at least one geometricprogression or in accordance with a superposition of such progressions.

The features according to the invention have been investigated andoptimized particularly thoroughly with skis and runners resp.. Thereinit has proved essential that at least one vibration-reactive subdivisionis realized which has at least one sequence of distinct spatial and/orsuperficial and/or linear regions extending in the longitudinal orrunning direction of the ski or runner body and having at least onevibration parameter each, which is dimensioned or distributeddifferently in relation to an adjacent region.

As to the common basis of the variations according to the invention thefollowing hint is given: Vibration-reactive in the sense of theinvention is a subdivision having distinct or in relation to theirvicinity different and subsequently, particularly in mutual couplingarranged regions, which with regard to their own vibration parameters orwith regard to vibration parameters defined by coupling with theirvicinity are in the range of characteristic frequencies or of thecharacteristic frequency spectrum of a body given as the initial objector of a body to be realized with certain properties. A quantitativedelimitation of the vibration reactivity, therefore, must comply withconditions of the relevant application. Such delimitation can beobtained theoretically or by calculation or by experiment on the basisof well-known criteria, often even directly evident. Accordingly, theeffect of such a vibration-reactive subdivision is directed to a desireddesign of the characteristic frequency spectrum. The target may be e.g.densifying the characteristic frequencies, i.e. increasing the number ofcharacteristic frequencies in a given frequency range, or the creationof new characteristic frequencies as well as an equalization,enhancement or lowering of the curve of the resonance amplitudes in afrequency range or a plurality thereof. All this can be used for awell-defined influence on sliding bodies with regard to their slidingand running properties and/or their steering ease or manoeuvrability,but also with regard to their durability under dynamic stresses.

In many cases, particularly e.g. for skis and runners, principally,however, also for carrier and buoyant bodies moved in media such as boatbodies and the like decreasing the surface friction is desired.Enhancement or new creation of relatively high characteristicfrequencies in the surface range of of the body can serve for this.

On the other side, in operation sliding bodies are under continual, butuneven i.e. mostly non-periodical stress with more or less shock-likepressure forces and/or bending and/or torsion moments. A correspondinglyuneven succession of short-time free (not constrained periodical)vibrations with the characteristic frequencies of the body is excitedthereby. The corresponding elastic deformations mostly have undesiredeffects, above all in lower frequency ranges, but in these frequencyranges they are relatively difficult to be dampened. Dislocation ofcharacteristic frequencies to higher frequency ranges or enhancement ofthe resonance amplitudes in these ranges by means of suitably designedvibration-reactive subdivisions can be a help here, and this often withrelatively low structural expenses. In particular it has to be statedthat the excitation energy from the successive shock-like stresses areabsorbed in a certain distribution over the characteristic frequenciesof the body. Accordingly, a relatively great number of characteristicfrequencies or an increased density of characteristic frequencies as itis obtainable by applying the ideas of the invention, can be used for ageneral decrease of the occuring maximal vibration or deformationamplitudes, preferably in combination with a dislocation of thevibration energy into less disturbing frequency ranges.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a stiffening rib which is profiled in amanner in accordance with a first embodiment of the present invention;

FIG. 2 is a schematic view of a plate-shaped vibration element which isprofiled in a manner in accordance with a second embodiment of thepresent invention;

FIG. 3 is a schematic view of an element which is profiled in a mannerin accordance with a third embodiment of the present invention;

FIG. 4 is a schematic view of a plate-shaped vibration element which isprofiled in a manner in accordance with a fourth embodiment of thepresent invention;

FIG. 5 is a schematic sectional view of the plate-shaped vibrationelement of FIG. 4;

FIG. 6 is a schematic view of a stiffening rib which is profiled in amanner in accordance with a fifth embodiment of the present invention;

FIG. 7 is a schematic view of a stiffening rib which is profiled in amanner in accordance with a sixth embodiment of the present invention;

FIG. 8 is a schematic view of a stiffening rib which is profiled in amanner in accordance with a seventh embodiment of the present invention;

FIG. 9 is a schematic view of a plate-shaped vibration element which isprofiled in a manner in accordance with an eighth embodiment of thepresent invention;

FIG. 10 is a schematic sectional view of a ski which is profiled in amanner in accordance with a ninth embodiment of the present invention;

FIG. 11 is a schematic plan view of the ski of FIG. 10;

FIG. 12 is a schematic sectional view of a ski which is profiled in amanner in accordance with a tenth embodiment of the present invention;

FIG. 13 is a schematic sectional view of a ski which is profiled in amanner in accordance with an eleventh embodiment of the presentinvention;

FIG. 14 is a schematic sectional view of a ski which is profiled in amanner in accordance with a twelfth embodiment of the present invention;

FIG. 15 is a schematic sectional view of a boat body which is profiledin a manner in accordance with a thirteenth embodiment of the presentinvention;

FIG. 16 is a schematic sectional view of a boat body which is profiledin a manner in accordance with a fourteenth embodiment of the presentinvention; and

FIG. 17 is a schematic sectional view of a skate which is profiled in amanner in accordance with a fifteenth embodiment of the presentinvention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The invention will be further explained with reference to the examplesof embodiments schematically shown in the drawings.

In FIG. 1 there is shown a stiffening rib in the form of a longitudinalextending vibration element SE connected in a shear-resistant mannerwith wall RB of a sliding body. Besides its static bearing function inreinforcing the sliding body this element being part of the body as awhole has substantial influence on the resonance spectrum and thevibrating transition behavior. Specifically here provision is made for asubdivision G of the longitudinal Profile, the subdivision beingdistributed in a non-uniform manner along the beam length and consistingof an as to the profile height additive superposition of fourequidistant sequences R1 to R4. Each such sequence comprises regions A1,A2, A3 and A4 of enhanced bending-deformation rigidity as well asregions B1, B2 ect. arranged alternatively with the latter ones andbeing of reduced bending-deformation rigidity. In the stiffened regionsthere is also an enhanced vibration mass packing, as far as not byadditional measures--such as a reduction of the profile width or areduction of the cross-sectional surface in the middle region of thecross-sectional height, e.g. in the form of excavations or holes--acompensation or even an overcompensation of such mass enhancement isaccomplished.

The vibration pattern of a resonant body in general consists of manifoldsuperpositions of standing waves of different wavelength and amplitude.In the node ranges there prevails a small or vanishing elastic bendingdeformation, in the antinode ranges a maximal elastic bendingdeformation. In the ranges of enhanced or reduced bending rigidityconsequently the formation of vibration nodes or antinodes resp. isfavoured. Now, whitest a simple equidistant distribution of regions ofenhanced and reduced rigidity favours the formation of a standing wavemerely concentrated in the range of one resonance frequency, which infact makes available certain desired enhancements within the resonancespectrum, the superposition of different equidistant sequences ofregions of enhanced and reduced rigidity renders possible theenhancement of a corresponding frequency band.

By choosing the distance values D1, D2 etc. (compare FIG. 1) of themutually superimposed sequences and by choosing the ratio values thereofthe ranges of the resonance spectrum, in which the enhancements appear,can be adjusted in a desired and reproducible manner to a great extent.In the interest of a well-balanced spectral curve and of a desiredadjustment of continuous transitions therein the rigidity differenceswithin the sequences may be dimensioned differently, advantageously insuch manner that these differences are stepped from sequence to sequencein a sense equal to the distance values. Such an embodiment has beenindicated in FIG. 1 by the profile contour represented by a continuousline. The partial contours of sequences R1 and R2 have been shown bydash lines. On the other side, in the interest of especially softtransitions the rigidity differences may be varied within one and thesame sequence also, such as in a manner so as to decrease towards bothsides starting from the central point of the vibration element or of asection thereof. E.g. this leads to subdivision G1 as shown in FIG. 1 bydash-dot lines.

FIG. 2 shows a plate-shaped vibration element SE2 with a superpositionalsubdivision G3 at both surfaces. These subdivisions in theircross-sectional profile are in accordance withthe superpositionaledge-subdivision G of FIG. 1 as already explained. The regions ofenhanced or reduced bending rigidity resp. are forming here a system ofjuxtaposed, longitudinally extending ridges or grooves resp., whichtransversely to their longitudinal direction are forming superpositionalsubdivisions of the kind explained already.

FIG. 3 represents in a schematical manner the possibility of furtherrefining a superpositional surface-subdivision, i.e. in the form of twosystems of ridge-shaped regions A1, A2, A3 of enhanced bending rigidity,these systems crossing each other on one surface of a plate-shapedvibration element SE3 and forming two superpositional subdivisions G3and G4 in the kind of FIG. 2. Between the ridge-shaped regions there areformed groove-shaped surface regions of reduced bending rigidity, notbeing provided with reference symbols for the sake of clearness.Subdivisions of this kind are allowing for a well-defined influence ontwo-dimensional standing wave patterns and should be taken intoconsideration for enhanced efficiency particularly with more ampleresonant assemblies. In cases where portions of plate-resonators with anextraordinarily diminished remaining cross-sectional thickness are to beavoided, a crossing arrangement of a ridge-groove subdivision on each ofboth plate surfaces is recommended.

Similar subdivisional effects in principal can be obtained with the aidof a non-uniform mass distribution also, in particular withplate-resonators. Presuming a uniform distribution of the deformationrigidity, the preferred locations of wave nodes and antinodes areinterchanged, i.e. in regions of increased vibration mass preferablywave antinodes, and in regions of reduced vibration mass wave nodes willappear. Obviously the marginal and fixing conditions of the vibrationelement section must be compatible with such a wave formation, which isvalid correspondingly for rigidity subdivisions also. When regardingthese conditions, combined rigidity ans mass subdivisions can be appliedwith advantage. By the way--as indicated already--non-uniform massdistributions generally will appear also with a non-uniform rigiditydistribution. However, in case of rigidity variations by means ofaccordingly dimensioning the cross-sectional height of a bendingvibrator, as generally to be adopted, the effect of mass-enhancement ina region of enhanced cross-sectional height is relatively slight,because the rigidity is effective with a higher power of thecross-sectional height due to its dependence on the cross-sectionalmoment of inertia. Then in many cases the mass enhancement can beneglected, but in any case it does not disturb generally.

On the other side mass subdivisions without substantial influence on therigidity can be obtained advantageously also in view of the production,by means of elevations or depressions resp., which are limited on allsides within the vibrating surface, i.e. which are of a dot-like shape.Such elevations or depressions can be formed particularly as holes ofsmall planar dimensions within a plate-shaped vibration element, whilefor regions of enhanced vibration mass packing the application ofadditional masses is favourable. In this way particularly rigidity andmass subdivisions can be combined with mutually enhanced efficiency.

FIG. 4 shows a grid-like mass subdivision G5 extending over the surfaceof a plate-shaped vibration element SE4 having circular regions AA1,AA2, . . . of enhanced vibration mass and equally shaped regions BB1,BB2, . . . of reduced vibration mass. In its basic structure this griddistribution is in accordance with a two-dimensional along crossimg linesystems according to FIG. 3.

Thereto FIG. 5 shows the structure of regions BB1, BB2, . . . formed asholes within the thin-walled plate element and the structure of regionsof enhanced mass formed as additional mass elements ZM1, ZM2, ZM3, . . .. The latter ones, e.g. in the form of simply shaped, button-likeelements can be fixed by glue. In the production there is an especiallyadvantageous possibility of application for elements ZM2 and ZM3 in theform of thin layers consisting of material of high density, as whichheavy metals and their alloys, particularly noble metals also, fall intoconsideration. These elements can be produced cenveniently in the formof foil segments and fixed by glue, but also in the form of formedmasses or or lacquer filled with metal. The latter has the specialadvantage of simplicity as to production technique.

The cross-sectional design of a stiffening rib according to FIG. 6 isbased on the knowledge that even in relatively compact objects relevanttransverse vibrations appear in the solid body, in the present caseamong others bending vibrations in different directions parallel to thecross-sectional face. Standing waves having their longitudinal directiontransverse to the rib's longitudinal direction there are favoured due tothe formation of regions of enhanced and reduced bending rigidity, whichregions are distributed according to superpositional structures G8a, b,c in accordance with a harmonic progression. Similar effects can beobtained by means of regions or elements ED of enhanced densityaccording to the rib embodiment of FIG. 7 being embedded in thevibrating solid body and arranged in the form of two superpositionalsubdivisions penetrating each other at right angles.

FIG. 8 again shows a stiffening rib with subdivision G10a as to its edgeand cross-sectional height, but with the cross-sectional heightdecreasing in the average towards the ends and with globally curvedshaping. In addition to the subdivision of said subdivisions G10a at theflanks of the rib provision is made for superpositional subdivisionsG10b with wave- and ridge-shaped depressions VT and elevations EH resp.running in the direction of the rib's height, that is with alongitudinal extension set off rectangularly in relation to thesubdivision G8a in FIG. 6.

FIG. 9 shows a superpositional subdivision on a plain plate element withrib-shaped mounted stiffening elements AV. Here the subdivision extendsmerely in a direction transverse to the ribs. The single ribs have beendesignated merely by the ordinal numbers 1 to 8 of the correspondingharmonics according to the denominator of the distance pitch of thesuperposition in question. The rib's height and, therewith, thestiffening effect decreases with the ordinal number, which specificallywith regard to application conditions may contribute to a well-balancedresonance curve. Such a substantially one-dimensional subdivisionfavours the formation of standing waves merely in one direction of theplate.

It should be pointed out that by means of the subdivisions according tothe invention--depending on the specific design--not only a well-definedtendency towards the formation of standing wave nodes and antinodesresp. can be obtained. Rather similar aspects are valid also for adesired distribution of the vibration dampening. To this end accordinglysuitable dampening elements have to be provided in a vibration-reactivesubdivision.

The FIGS. 10 to 14 are showing as further examples differentvibration-reactive subdivisions according to the invention on a ski.FIG. 10 and 11 illustrate schematically a longitudinal subdivision LXwith profile elevations and depressions of the kind of the basicembodiments according to FIG. 1. Such an embodiment above all hasinfluence on the bending vibration behaviour of the ski. The embodimentsaccording to the FIGS. 12 and 13 are provided with vibration-reactivesubdivisions QX1 and QX2 resp., that is in the form of strip-shapeddepressions or excavations extending in the longitudinal direction ofthe ski at the upper side or in the interior of the ski body'scross-section. If in the form of excavations, obviously provision willbe made for a suitable cover, for which vibration-reactive effects arenot necessary. FIG. 14 shows, again schematically, a vibration-reactivesubdivision HX extending in the direction of the cross-sectional heightof the ski and having the form of lamella-like, stiffening and/or massenhancing insertions in the ski body. Essential for all these variationsis the structure of the subdivision, i.e. a multiple superpositionalsubdivision in the kind of FIG. 1. The equidistances of the singlesuperimposed sequences, measured in portions of the length or thecross-sectional width or height of the ski body, have been indicated byinteger numbers. The subdivisions according to the FIGS. 12 to 14 haveinfluence on the behaviour of the ski above all with regard to torsionalvibrations. Intensive practical testing, above all in racing-like testruns, has shown that by the subdivisions according to the invention withskis of different basic construction remarkable amendments can beobtained with regard to quiet running even on rough tracks as well as tosafe track holding, surprisingly even in combination with amendedmanoeuvrability. Also worth mentioning is a more intensive sensingcontact of the driver with the properties of the ski-run. In particularadvantageously sliding bodies of this kind may be provided withsubdivisions composed of up to five superimposed sequences of differentpitches. Preferably the distances of the sequences will be dimensionedaccording to harmonic or geometric progressions, again preferably withinternally equidistant sequences according to FIG. 1.

As examples for numerous applications in the field of media-slidingbodies in the FIGS. 15 and 16 boat bodies have been shown merelyschematically in a cross-section and longitudinal section resp., that iswith superpositional subdivisions BSX and KLX extending in aport-to-starbord direction and in the direction of the keel resp.. Suchvibration-reactive subsubdivisions can be formed e.g. of longitudinaland transverse ribs as distinct regions connected with the inner wall ofthe body.

As a last example FIG. 17 shows two two vibration-reactive subdivisionsKOX and KSX, again according to the kind of FIG. 1, extending with theirelevations and depressions along internal or external edge ranges resp.of a skate runner. Here particularly a reduction of friction can beobtained due to deforming vibrations of the runner body with relativelyhigh frequencies.

What is claimed is:
 1. A sliding device, in particular a ski,comprising:a sliding body, and means on said sliding body forcontrolling vibration behavior of said sliding body, said meanscomprising:at least one sequence of a plurality of spatial, planar orlinear areas (A1, A2, A3; B1, B2, B3), each of which is distinguishedfrom at least a part of its vicinity by at least one differentlydimensioned or distributed vibration parameter; the center distances(D1, D2, D3) between subsequent distinguished areas, or the distancesbetween certain sections within subsequent distinguished areas, beingdimensioned according to at least one predetermined increasingly ordecreasingly varying progression; said increasingly or decreasinglyvarying distances being configured such that said areas establish avibration active structure (G) of said sliding body with a plurality ofnatural or resonant frequencies.
 2. A sliding device, in particular aski, comprising:a sliding body, and means on said sliding body forcontrolling vibration behavior of said sliding body; said meanscomprising:at least one sequence of a plurality of spatial, planar orlinear areas (A1, A2, A3; B1, B2, B3), each of which is distinguishedfrom at least a part of its vicinity by at least one differentlydimensioned or distributed vibration parameter; the extremal or averagevalues, or the distribution of the values, of at least one vibrationparameter in subsequent distinguished domains being dimensionedaccording to at least one predetermined increasingly or decreasinglyvarying progression; said increasingly or decreasingly varying distancesbeing configured such that said areas establish a vibration activestructure (G) of said sliding body with a plurality of natural orresonant frequencies.
 3. A sliding device according to one of claims 1or 2, in which the distinguishing vibration parameter of said spatial,planar or linear areas is selected from the group consisting of (i)spatial or planar local mass density, (ii) deformation rigidity, and(iii) vibration damping.
 4. A sliding device according to one of claims1 or 2 including a sequence of distances or values varying oscillatinglyat least by sections.
 5. A sliding device according to one of claims 1or 2 wherein said at least one increasingly or decreasingly varyingprogression is a harmonic progression.
 6. A sliding device according toone of claims 1 or 2 wherein said at least one increasingly ordecreasingly varying progression is a geometric progression.
 7. Asliding device according to one of claims 1 or 2, characterized by atleast one vibration-reactive subdivision which comprises at least onesuperpositional structure extending in a linear, superficial or spatialmanner and including at least two sequences of distances and/orpartitions and/or values.
 8. A sliding device according to claim 7wherein said superpositional structure comprises at least twoequidistant sequences.
 9. A sliding device according to claim 8 whereinthe values and/or distributions of at least one vibration parameter inthe succeeding distinct regions of one of said equidistant sequences aredimensioned at least approximately equal.
 10. A sliding device accordingto claim 7 wherein at least one of said at least two sequences is atleast partially a harmonic or geometric progression.
 11. A slidingdevice according to one of claims 1 or 2 wherein at least one sequencehas distinct regions with differently dimensioned or distributedvibration parameters and extending in a plurality of spatial or planardirections.
 12. A sliding device according to claim 11 characterized inthat different dimensions or spatial or superficial directions in whicha sequence of distinct regions with differently dimensioned ordistributed vibration parameters extends, are coordinated with sequencesof at least partially different distances between said distinct regionsand/or of different vibration parameter variations from region toregion.
 13. A sliding device according to one of claims 1 or 2 includingat least one vibration-reactive preferably harmonic or geometricsubdivision, particularly for a plurality of such vibration-reactivesubdivisions in mutual superposition, extending over at least fivepitches.
 14. A longitudinally extending sliding device according to oneof claims 1 or 2 including at least one vibration-reactive subdivisionextending in the direction of the width of the sliding device.
 15. Alongitudinally extending sliding device according to one of claims 1 or2 including at least one vibration-reactive subdivision extending at anangle, preferably approximately a right angle, to the plane defined bythe length and width of the sliding device.
 16. A sliding deviceaccording to one of claims 1 or 2 wherein the distinct regions ofdifferent vibration parameters are distributed along at least one edgeof the sliding device.
 17. A sliding device according to one of claims 1or 2 in which a plurality of said vibration parameters comprise areas ofreduced mass density or deformation rigidity formed as depressions orperforations within a surface of said sliding body.
 18. A sliding bodyaccording to one of claims 1 or 2 in which a plurality of said vibrationparameters comprise areas of enhanced or reduced local mass density orlocal deformation rigidity formed by means of elements embedded in saidsliding body.
 19. A sliding device according to claim 18 in which saidembedded elements comprise at least in part a material different fromthe basic material of said sliding body, in particular a material ofenhanced or reduced mass density and/or enhanced or reduced elasticmodulus.
 20. A sliding device according to one of claims 1 or 2,comprising a surface layer portion forming said vibration parameter. 21.A sliding device, in particular a ski, comprising:a sliding body, andmeans on said sliding body for controlling vibration behavior of saidsliding body, said means comprising:at least one sequence of a pluralityof spatial, planar or linear areas (A1, A2, A3; B1, B2, B3), each ofwhich is distinguished from at least a part of its vicinity by at leastone differently dimensioned or distributed vibration parameter; thecenter distances (D1, D2, D3) between subsequent distinguished areas, orthe distances between certain sections within subsequent distinguishedareas, being dimensioned according to at least one predeterminedincreasingly or decreasingly varying progression; the extremal oraverage values, or the distribution of the values, of at least onevibration parameter in subsequent distinguished domains beingdimensioned according to at least one predetermined increasingly ordecreasingly varying progression; said increasingly or decreasinglyvarying progressions being configured such that said areas establish avibration active structure (G) of said sliding body with a plurality ofnatural or resonant frequencies.
 22. A sliding device according to claim21 in which the distinguishing vibration parameter of said spatial,planar or linear areas is selected from the group consisting of (i)spatial or planar local mass density, (ii) deformation rigidity, and(iii) vibration damping.